Rock-drilling machine.



P'ATENTBD JUNE 19, 190B.

4 SHEETS-SHEET l.

ejsgsefs.

No. 823,980. PATENTBD JUNE 19, 1906.

0. IVI. WALKER. v ROCK DRILLING MACHINE.

APPLIGATIOH FILED Kev as 1904 r. w n e w I PATENTBD JUNE 19, 1906.

G. M. WALKER. Roux MILLING MAGHINB.

APPLIATION FILED NGV, 28.1904.

4 SZEETS-SHEBT 3 ../w Z; mim. i@ w f No. 823,980. PATENTES JUNE 19, 1906.

G. M. WALKER. ROCK-DRILLAING MACHINE.

Ammonmn rum Nov.2s.19o4.

' 4 SHEETS-SHEET 4.

ziaria eys UNITED STATES PATENT oEEroE.

CASSIUS M. WALKER, OF PUEBLO, COLORADO, ASSIGNOR TO 2HE WALKER-MOORE ROCK DRiLL MANUFACTURING AND SUPPLY COMPANY, OF PUEBLO, COLORADO, A CORPORATiON OF OOLO- RADO.

` ROGK-DRSLLlNG MAGHINE.

No. seaioso.

Speccation of Letters Patent.

Patented June 19, 1906.

Application liled Rvvember 28,1904. Serial No. 284,808.

To civ/l wtom t may concer-n: j

Be it known that I, CAssIUs M. WALKER, a citizen of the United States, residing at Pueblo, in th county of Pueblo, State oi Colorado, have invented certain new and useful lniprovernentsinRook-Drilling Machines, of whieh the following is a. specification.

My invention relates to rook-drilling machines, end hes for its object to improve and simplify the construction, arrangement of parte, and inode of operation of the seme; and to these ends my invention consists in the various features of construction end arrangement of parts having' the general inode of operation end accomplishing the results ne hereinafter more particularly set forth.

In the accompanying drawings, wherein l have illustreted a preferred embodiment of my invention, Figure i is' a longitudinal perpendicular section oi' the machine. Fig. 2 is en enlerged perepeotive view of the herinner and allied parte. Fig. 3 is a similar perspective view, partly in section, of the chuckelutohj cheek, and allied parte. Fig. i is n vertioel eeetion of n stone in which e hole hes been out, showing the manner of using the ineehine. Fig. 5 ie e transverse section.

through the mein volvo. Figs. 6 end 7 ere enlarged cross-sectional views through the inein valve. showingr the different positions of' the seine with relation to the ports oontrolled thereby. Fig. 8 is e still lfurther enlerged inverted pien section oi the bottoni ortion of the lower eylind er, showing the deteils oi' the cheek-valve; and 9 is elV oroseseotion of e water-tenirs showing o. manner oi supplying Werte? to the drill end illustrating; diegreinnietioaly the connection of the trink wlfh the drilling mechanism.

While my invention muy he embodied in various forms end the details of construction and arrangement varied in oeeordenoe with the requirements thereof, the embodiment shown 1n the drawings hee been found satiefaetory, end l will describe my invention in connection therewith.

The machine comprises en upper cylinder or shell l and a lower cylinder or shell 2, prop-V erly formed end shaped and secured together in any suitable wey, as bv serews 34. The upper cylinder l is closed hy e. heed 3, which muy be secured in eusuel manner and is pref- Ysure for operating the valve.

erobly provided with o rubber bu'er 7 on its inner side.

Mounted in the body or shell is e piston or hammer 6, edepted to be reeiprooeted therein and to operate uon the heed-piece S of the eliuek 8, which e iuok carries the ontting tool end reeiprooatee in the lower cylinder in the manner hereinafter described. The

movements of this hemmer or piston are controlled by a volvo 4, which in turn controle the various ports and passages in the inenner hereinafter forth. i`his valve is tope-red longitudinelly end provided between its hoede with e web 4, arranged so ee to extend ehove its center, end thus control the ports, and et the seine time it' is held hv the pros` sure to itsseet, the pressnreheneoth the velveserving to insure it lie-ing well seated et top oi the bore even if its sont should be worn more or less. To further insure the volvo being pro erly Vheld to its seet, its larger hea-d is provii ed with en opening 4b, through which pressure is introduced against the ler Ver end of the vulve.

Y n order to operate the vulve, it provided with e valve-dogn 5, the upper end of wint-...ln t, iite looselyT in e socket in the end oi the valve 4, the edges 4g, against which the dog iinl pinges, providingr e vermin mnoont ol' elem'- enoe und the position of which detorlnirwe the length of stroke of the hammer. This dog is provided with prongs 5 and 5" nl. its

free end, which engage e rib 3S upon the honiA nier 6, and this hnlniner ie prefer-ohh' pro vided with grooves 24 :it oooh eide of the rio, so that theveive een he. operated hy the pisv ton in its reeiproontione to eontrol the proo- Y it will lio oli served that thevelve-dog 5 is not rigidly oonngeted to the hody oithe vulve, lmt ie lreo to inove in its eoelret end only moves the volvo when it iin iingee on one or the other oi the edges 4g. liv this oonetruiftion o'lY volvo end the in'rengeinent oijierts it will he eeen than.

i the velve does not. rotate to any greet extent in its sont, lint only eirliioent to reuse its wel.) to onen end lose the respective ports in the manner hereinafter described, und thus weer on the velve is saved :ind it operates quiokly in controlling the flow of pressure :it the time desired.

in order to producotho Smoby-emp rotetlie I lion or turning movement of the hammer at cach reciprocalion, l provide a ratchet I7, which is mounted in the case through which thc hammer slides and which is engaged by a series of pawls 3S), suitably supported in the case and preferably having springs 4() to hold them to their seats, and thus prevent the ratchet urning in one direction. rlhis ratchet is providral with lugs 17" and 17", which engage spiral grooves 23 23, formed in the body of the hammer 6, and by means of thi-sc the hammer is caused to turn on its upward movement, while in its downward movement the ratchet is rotated. 'lhis rotary movement of the hammer is communicated to the chuck in some suitable way, and in the `)resent instance I have shown the chuck 8 as being provided with a slot 4l, into which exs', tends a lug 25 on the clutch 25, and this clutch receives rotary movement from the hanuner by means of the keys 18, secured in slots '12 in the clutch and sliding in the keyways 22 in the hammer. The keys 18 preferably slide between parts of a sectional bush-- ing U in the lower part of the main cylinder, and these serve not only to stiften the keys, but aid in holding the parts in their proper positions, and the lower ends of the bushingscctions are notched, as indicated at 9", to permit the passage of the fluid into the lower end of the main cylinder.

The chuck 8 is provided with a piston 36, moving in the lover portion of the cylinder, and the end of the tool 32 is secured in the socket ofthe chuck in any suitable way; but as shown I have rovided two collapsible jaws 46, having conical ends 46 and adapted to embrace the tool and be forced into position by a check-nut 35, the bearings for these jaws being correspondingly coned or shaped, so that as the check-nut is screwed in it forces the jaws to tightly grasp and securely hold the tool in position. y i

'lhe chuck reciprocates through the cylinder-head 26, and this head is provided with a stuffing-box 44 and gland 27, so as to properly ack the head and provide close joints. 'l`hc liead is held in place in the present instance by a reducing-collar 28, to which is connected the hollow cylinder 2), in whichis mounted the cleaning-tube 3l, which envelops the tool 32, and I have shown a gland 30, which aids in cleaning-tube in position and packing the joint between the tubiI and cylinder. 'l'he tube is flanged at its inner end, which prevents it from working entirely out ol the cylinder 21), while at the same time it permits of adjustment longitudinally and rotatively therein. 'lhis is important, as if perchance the tulle Should becolile. bent or crushed so :is to engage the cutting-tool it can be adjusted as above indicated, and the cylinder and gland, wir` li the packing around the tube, will supporting the enveloping permit a certain amount ol' motion or adjustment of the tube.

rlhc tool is designed to beopcratedby luidpressure, such as steam or air, and this is sup- )lied at the main pressure-inlet port 47, and lrom thence it passes to the valve-chamber, from whence its passage is controlled by the valve 4, so that it can pass through the ports 15 or 16, extending to opposite ends of the main cylinder and operatm f as inlet or exhaust )orts therefor, accorrhng to the position o` the valve. Connected to the valvechamber is an exhaustort l2 for permitting free passage of the ex iaust to the open air when openil but this is provided with means for throttling it or entirely closing it, as bya tapering valve 1(),held in position by a gland 11 and capable of being rotated and ad'uted in any desired position to secure the dlesired amount of throttling. The purpose of this throttling ol the exhaust is to permit the same to be used for cleanin the hole formed in using the drill, and in or( er to permit this there is connected with the exhaust-port l2 ports 1X and ll, the former of which is open to thc air und may be connected to a proper pipe 62 in a manner hereinafter described and the latter ol' which leads to the openings 43 in the cylinder-head and gland 26 and 27 and chuck thus delivering the exhaust through the tube Jil at or near the bottom of the hole formed by the tool and enabling it to force out thel cuttings from the hole. 'lhe port or passage I4 is provided with a valve 33, and communicating with the port or passage 14 is an opening 33, to which a flexible pipe may be connected and through which water may be. introduced into the passage and forced through the enveloping cleaning-tube. Sometimes it is preferable to use high- )rcssurc fluid for the purpose, of cleaning the iole, and in order to permit thisl a passage lil at the side of the casing-section 2 communicates with the port 47 and is provided with a valve 2l, which can be opened to permit the live (luid from ythe port 47 to communicate through the channels 43 with the interior of the cleaning-tube.

One ofthe important features of my invention is the means for providing a cushion for the chuck 8 to prevent injury to the cylinderhead 26 from overstroke, and to do this the main inlet-port 47 is connected by a passage 37 to the live pressure port or passage I9 and communicates through a port 2() with the lower cylinder beneath they chuck-piston 36. lt will be seen in Fig. ,8 that 1 xtending from the live port or passage 19 is -a port 6l, ro'- vided with a cheek-valve ),normally he d in its seat by a spring 68 and plug 69 and operating in the manner hereinafter described t0 control the flow of fluid to form a cushion for, the chuck.

llaving thus described the various parts or f ICO tentures of construction of my machine end specified their relations to each other, their Inode of operation will he largely understood by those skilled in the art, end 1t may be described somewhat briefly es follows: Assuniing;r the parts to he in the positions shown in Fig. 1, with the hammer 6 leaving the extreme upper end of its movement, the valve et is moved to bringr its web to the position shown in Fig. 6, thus opening the port 16 to the main pressure-supply from the inlet-port 47 and at the same time opening port 15 to exheusti-port 12 and to the ports 13 and 14, as the case may bc, and pressure willenter the cylinder at its upper end et B and drive theV hammer or piston 6 toward the opposite end of the cylinder, where it comes into violent contact with 'the chuck-heed 8, thereupon delivering a blow through the chuck 8 to the stone-cutting tool 82. In doing this the'position of the valve 4 has been changed to that indicated in Fig. 7, making the port 15 the pressure-port and port 16 the exhaust-port- It will be observed that the valve 4 is moved hy the dog 5 engaging the rib 38, and owing to the clearance between the edges' 4E there is lost motion in the dog, so that the valve is not moved until just before the chuck reaches the cxtreme of its movement, end then it is quickly moved through e short portion of the rotation, sufficient to cause its win s 'to assume their proper position (indicate inFigs. 6 and T) to control the Bow of duid to and from the cylinder, and thus it is exposed to a little weer. As above intimated, the fluid pressing against the web tends to hold the Valve in its seat, and it is further held in its seat, when so desired, hy means of the opening 4l permitting the full 'pressure el the Huid against the large head of the tepering valve. lt will he understood that as the hammer reciprocates in this inenner it rotates the cutr tiiigt ;ol step by step, and as the hammer moves downward the ratchet 17 through the lug 17 engaging the spiral groove 23, is par tislly rotated, und as the hummer nieves upu ward, the ratchet being held from rotating hy the pawls 39, thc hammer is forced to rotate a piu-tial revolution and through the keys 18 rotates the chuck 8 and the tool carrif'il thereby.

it will bo noticed that the live fluid is supplied tu thc inlrt-poi't [El under lull pressure and passes by' way of the port :0 into the lower portion of thix cylinder licneeth the -lu|c-l\'.pis1.oo 36, so that in this cylinder the pressure is equal to that supplied to thc pistou, and the 'liock-\fnl\fe 6U prevents the Iluid from returning to the source of supply, so that this pressure once attained in this chenilles' or cylinder is never exhausted from it and fox-ius a cushion for the chuck, the iiuisl lacing compressed between the chuckpiston 36 and the cylinder head 26, which will effectually protect the machine from injury from overstroke. It will thus be seen that by this varrangenwnt the cushioning fluid is constantly kept at the full pressure of the supply, end when the chuck nieves downwerd the pressure of this cushioning fluid is increased over that of the source of supply.

As shove intimated2 the cuttings muy he vblown out of the hole either hy live pressure or exhaust pressure fluid, and when it is desired to use the live pressure the valve 21 in the passage 19 is opened, permitting the fluid to flow to the ports 43 through the en- Vtreiopintf., cleaning-tube 31, which extends to or near the bottom of the hole. When, however, the exhaust fluid is used directly for this u1' ose, the exheustfport 12 is throttled to t e t esired extent, causing the exhaust luid to pass through the exhaust-ports 13 14, and the valve 33 being opened it will pass through the ports or channels 43 and through the envelopin cleaning-tube 31, as before.

When it is cglesired to use water in connection with the fluid, it may be supplied in any suitable wey, as at th' opening 333, and the apparatus indicated in Fig. 9 may be used. To do this, the hose or pipe 62, for instance, may be connected to the exhe ust-port 13, and the other end may be connected to the T 64, either immersed inthe water in the tanlt 67 or connected to the exterior of the tank. This T is provided with a cheek-valve 65, and it will beY seen that normally the whter will rise inV thevhose 62 and 63, the latter heing connected to the opening 33", the valve 33 beingr closed, and when the exhaust fluid posses tl'irough the hose 62 it forces the water through the hose 63, thereby emptying the hose 62 and 63,3and as the exhaust-pressure falls therein the water flows into the T pest the check-valve 65 and again supplies the hose with s portion of water. lt will thus bev seen that the hole may he cleaned by means of the enveloping cleaning-tube, practically surrounding the cutting-tool andrcarried on Ythe shell or body oi' the tool, by the use of either the live pressure fluid or enhaustpressure fluid or with the addition ol weter mixed with the fluid.

it has heretofore been common to supply the iiuid for the purpose of cleaning the holes hy passing it through an opening in the tool itselfpand while this is ril'cctive to a greater or less extent it is expensive. By the use of the inivclopingV cleaning-tube the cleaning; may lio readily'arcoiuplisliod at little expense, avoiding the necessity of melting all the cutv ting-tools hollow or with alongitudinal open ing through them, which is not on ly experisivo, but interferes with the sharpening of the tools. .Y

l do not here claim' the valve device show-n,

as it constitutes the subject ol e divisional applicetion for Letters letent, Serial No. 253,301.

Having thus described my invention,wluit I claim is- 1. In n rock-drilling mnehine, the eombination with a cylinder, e drill, n elenningtube Surrounding the drill, n. hummer, und ports supplyinf pressure thereto, of n. vulve controlling sin' porte, und nn exlmnst-port provided with menne for throttling the ymue and means for eondueting the exhaust to the tube, substantially es set forth.

2. 1n a roek-drilling mnehine, theeoinbination with cylinder, n ehuek for holding :i drill, a cleaning-tube surrounding n drill, n hammer, and ports supplying pressure there.- to, of n valve eontrolling seid ports, n mnin exhaust-port exhausting to the nir, menne for throttling the Same, n seeond exhaust-port, und connections for conducting the exhnust to the cleaning-tube to eleun the hole formed by the drill, substantiully es deeeribed.

3. In a. rock-drilling muehine, the eombination with a cylinder, e ehnek lor e, drill, :i cleaning-tube surrounding the drill, :i luunmer, and ports supplying pressure thereto, ol' i a. valve controlling said ports, einem exhaustport exhausting to the nir, menne t'or throttling the same, a second exlmust-port eonnected to supply exheustllnid to the elesmingtuhe, and means for also supplying wnter to said connection, substantially as deserihed.

4. [n a rook-drilling maehine, the eombination with a cylinder, und n piston-hummer reciprocating therein und provided with a B iral groove, of e. chuck and drill eonneeted therewith, a ratchet mounted to turn in the cylinder and surrounding the hummer, pawls supported by the cylinder' und engng lng the ratchet, and n projection on the mtchet entering the groove in the hummer to turn the letter, substantially es de werilied.

5. ln a rock-drilling meehine, the eombination with a cylinder, und a piston-lmmmer mounted therein, ol' a chuck also mounted in the cylinder, a ratchet end eonneet ions for rotatin the hummer thereby, keys enrried by the o uok, und keyways in the lnnnmer for rotating the chuck, substantially ne described.

(i. In n. niek-drilling machine, the eombination with a cylinder, of a piston-hammer and a chuck mounted therein, eratehet, connections between the ratchet and hummer for rotating the lutter, a eeetionel bushing und rill eonneitiiig und extending hehstuntnillv ne demounted in the eylinder, the hummer und ehuek tween the bushings, su scribed.

7. ln u melt-drilling lnuehine, the eombnntion with n evlinder haring n pieton-hummer und n elnleh mounted therein, und inlet und exhuuwt ports, ol' n tool mounted in the ehnek, :i eleuningtnbe enveloping the tool, und n e vliinlei'-l|e:nl provided with ehnnnels eonneeting will the exhnust -port whereby exhnust lluid inn \y be .-upplied to ther-leuningtube duringl the drilling operutiolw, snbstnntinlly :is deseribed.

X, ln n niek-drilling nuiehine, the eombinution wit h ueylindeign hinunter und nehm-k mounted therein, :ind inletnnd eduinst ports, oll n` tool moulded in the ehueh, u elenningtube enveloping the tool, :ind meurminelnding eontrol-vnlves for supplying either live or exhnnst pressure lluid ns desired to the elem]- ing-tnbe, substnntnllyy :is deseribed4 t). ln n roek-drilling nun-bine, the eombinntion with n eylinder und with the heed thereol', oll n cylinder eonneeted detm'lmbly to nid hend und provided willi n peekingbox nt the outer end, n elearning-tube extending through sind box und llnnged nt the inner i end, und n eutting-tool extending through theelearning-tutu', with menne4 l'orA operating 4nid tool, snbstnntinllv as Qety l'orth.

It). 'l`he eombinntien ol' :1 ensing, n pistonhaunmer und u piston-ehnek movnble therein, n ratti-het Hurrlnlnding t he hummer, menus for rotating snid rntrhet, n elnteh eonneeted to rotule with the rntehet by keys lueeurerl tothe elnteh :ind extending into the hummer, :and ineens for turning the ehuek with the elutt'h, subetnntinll)l :is deseribed.

l l ll'lle eoinbinution of the ensing, pistonhnnuner, piston-rituel@ menus for supplying lluid under pressure to reeiproente the linmlner, nn exhnnst, menusl lor throttling the ex'- lnnmt, :i elenning-tulw, n vnlve-eontrolled ehunnel :ind ports whereby the exhaust nur)r be eondueted to lmid tube, und u vnlve-e`ontrolled r-hnnnel und ports whereb)r the live pressure muy be eondneted to the elearningtube, lenlistnntinlly es Iwt forth.

ln testimony whereof l have `signed in v nume to this speeiliention in the presenee ol' two subseribing witnesses.

v (lASSlllS M. WAlilx'lll.

Witnesses:

Wn. li. llAu'rMAN, Himmler Nl. ILEAS.

lOO 

